{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "potential therapeutic event", "arguments": ["Treatment.Route", "Subject.Disorder", "Subject.Gender", "Subject.Age", "Subject", "Subject.Population", "Treatment.Disorder", "Treatment.Time_elapsed", "Treatment.Dosage", "Treatment", "Treatment.Drug", "Subject.Race", "Treatment.Duration"]}], "input": "An episode of leukoencephalopathy is reported in a 13-year-old girl who, after standard radiotherapy for a posterior fossa medulloblastoma, received 8 treatments with a protocol containing a 4-hour infusion of 500 mg/m2 methotrexate and 12 mg intrathecal methotrexate."}
{"potential therapeutic event": []}